The Kinetics of Formation of Microporous Polytriazine in Diphenyl Sulfone |
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| Authors: | Andrey Galukhin Ilya Nikolaev Roman Nosov Sergey Vyazovkin |
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| Affiliation: | 1.Physical Chemistry Department, Alexander Butlerov Institute of Chemistry, Kazan Federal University, Kremlevskaya Str. 18, 420008 Kazan, Russia; (I.N.); (R.N.);2.Department of Chemistry, University of Alabama at Birmingham, 901 S. 14th Street, Birmingham, AL 35294, USA |
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| Abstract: | This study highlights the value of nonisothermal kinetic methods in selecting temperature conditions for the isothermal preparation of microporous polymeric materials. A dicyanate ester is synthesized and the kinetics of its polymerization in diphenyl sulfone are studied by calorimetry under nonisothermal conditions. The kinetics are analyzed by a model-based approach, using the Kamal model, as well as by a model-free approach, using an advanced isoconversional method. Both approaches correctly predict the time to completion of polymerization at a given temperature. The material prepared independently at the predicted temperature is characterized by electron microscopy and CO2 adsorption measurements and is confirmed to possess a microporous structure with a multimodal distribution of micropores with two major maxima at ~0.5 and 0.8 nm. |
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| Keywords: | cyanate esters polymerization kinetics microporous polymers polytriazines differential scanning calorimetry isoconversional kinetic analysis |
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